Information Loss Paradox Tested on Chiral Fermion Coupled to a Background Dilatonic Field

TL;DR

This paper investigates the information loss paradox in a model with chiral fermions and a background dilatonic field, showing that unitarity is preserved and information is not lost, contrary to previous claims.

Contribution

It demonstrates that the presence of chiral fermions does not violate unitarity in dilatonic black hole scattering, highlighting the importance of regularization in the paradox.

Findings

Unitarity is preserved in the model.

Chiral fermions do not cause information loss.

Regularization affects the information paradox.

Abstract

A model where chiral boson is coupled to a background dilatonic field is considered to study the s-wave scattering of fermion by a back ground dilatonic black hole. Unlike the conclusion drawn in \cite{MIT} it is found that the presence of chiral fermion does not violate unitarity and information remains preserved. Regularization plays a crucial role on the information paradox.